Brake booster needs replacing - BMW M5 Forum and M6 Forums
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post #1 of 10 Old 7th June 2019, 05:26 AM Thread Starter
zazbeam
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Brake booster needs replacing

Booster sucked water while drain was plugged. You've heard the story before. I let it dry up and have driven it about a year and a half with no problems... Until now.

Anyway, I don't know if I have the diy skills/ ability to do the job. There's something about the brake fluid, master cylinder etc that makes me nervous and I need it done right.

How many hours of labor am I looking at at an Indy shop you think?

Thoughts?

Thank you!
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post #2 of 10 Old 9th June 2019, 02:37 AM Thread Starter
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post #3 of 10 Old 11th June 2019, 07:52 PM Thread Starter
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post #4 of 10 Old 11th June 2019, 09:05 PM
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Im going to just guess $500-$750

you have to figure they are going to mark up the parts and charge at least 2 hrs labor and a brake bleed.
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post #5 of 10 Old 12th June 2019, 08:32 PM Thread Starter
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post #6 of 10 Old 12th June 2019, 08:38 PM
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De nada!

I think you can do it your self, especially if you get a pressure bleeder and some flare nut wrenches, might not even need these. There are some good DIY videos and post to guide you.

I did mine not that long ago and as far as projects go it was pretty simple.

Cool you have a Buick GS, I have owned many muscle cars. Probably why I like the M5 so much, total German Muscle car.

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post #7 of 10 Old 12th June 2019, 09:36 PM
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Hi, I had this issue happen to me about a month ago. I managed to suction the water out and all is well now. What kind of issues are you having at this time? I plan on replacing mine but was wondering what the long term effects were. Thanks
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post #8 of 10 Old 16th June 2019, 01:38 AM Thread Starter
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Yea you are kinda right. Bought the GS in socal back in 2000 because I wanted a V8 four seat convertible. The car is frickin awesome... Ended up needing a car after I sold my truck so in 2015 I went looking for a V8 powered sedan WITH a manual transmission... Ended up with the M5, and bought it coincidentally in the same town in socal. Meant to be? I don't know, but the cars seem compliment each other in a really cool way. : p

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post #9 of 10 Old 16th June 2019, 01:42 AM Thread Starter
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My booster went out about 2 years ago and while it did dry out, during the last month or two the car has showed symptoms of the booster going bad occasionally when I first start to drive it. Vacuum lines are good but I just feel like the diaghram inside the booster got wet, then dried out and seems to have now lost its pliability thus not sealing the vacuum needed to brake the car normally. It will slowly get worse I think.

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1969 Buick GS 400 convertible
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post #10 of 10 Old 16th June 2019, 03:31 PM
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If you are going to have to bleed the brake system anyway, consider doing the master cylinder at the same time. Great discussion on a recent thread about using the E60 master cylinder for improved brake feel.

Regards,
Jerry

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